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| author | Dmitry Monakhov <dmonakhov@openvz.org> | 2013-04-11 23:24:58 -0400 |
|---|---|---|
| committer | Theodore Ts'o <tytso@mit.edu> | 2013-04-11 23:24:58 -0400 |
| commit | 7e8b12c60ad38fb90a162df4e6fc120e3bee104e (patch) | |
| tree | defb07402dc57965237bd40af2ed1e92a7efcbb7 | |
| parent | 43e50f50866513144026f2ac1a1c5cc20c7a8428 (diff) | |
| download | linux-7e8b12c60ad38fb90a162df4e6fc120e3bee104e.tar.gz linux-7e8b12c60ad38fb90a162df4e6fc120e3bee104e.tar.bz2 linux-7e8b12c60ad38fb90a162df4e6fc120e3bee104e.zip | |
ext4: defragmentation code cleanup
- grab_cache_page_write_begin() may not wait on page's writeback since
(1d1d1a767206). But it is still reasonable to wait on page's writeback
here in order to be on the safe side.
- Fix miss typo: pass 'length' instead of 'end' to __block_write_begin()
https://bugzilla.kernel.org/show_bug.cgi?id=56241
TESTCASE: git://oss.sgi.com/xfs/cmds/xfstests.git
MKFS_OPTIONS="-b1024" ; ./check ext4/304
Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org>
Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
Reviewed-by: Akira Fujita <a-fujita.rs.jp.nec.com>
| -rw-r--r-- | fs/ext4/move_extent.c | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c index 661f4ce688ec..309ca899a731 100644 --- a/fs/ext4/move_extent.c +++ b/fs/ext4/move_extent.c @@ -739,6 +739,7 @@ mext_replace_branches(handle_t *handle, struct inode *orig_inode, donor_off += dext_alen; orig_off += dext_alen; + BUG_ON(replaced_count > count); /* Already moved the expected blocks */ if (replaced_count >= count) break; @@ -816,7 +817,13 @@ mext_page_double_lock(struct inode *inode1, struct inode *inode2, page_cache_release(page[0]); return -ENOMEM; } - + /* + * grab_cache_page_write_begin() may not wait on page's writeback if + * BDI not demand that. But it is reasonable to be very conservative + * here and explicitly wait on page's writeback + */ + wait_on_page_writeback(page[0]); + wait_on_page_writeback(page[1]); if (inode1 > inode2) { struct page *tmp; tmp = page[0]; @@ -1034,7 +1041,7 @@ data_copy: } /* Perform all necessary steps similar write_begin()/write_end() * but keeping in mind that i_size will not change */ - *err = __block_write_begin(pagep[0], from, from + replaced_size, + *err = __block_write_begin(pagep[0], from, replaced_size, ext4_get_block); if (!*err) *err = block_commit_write(pagep[0], from, from + replaced_size); |